Pipe and nut wrench



UNITED STATES PATENT OFFICE.

LAWRENCE GLYNN, OF GAMBRIDGEPORT, MASSACHUSETTS.

PIPE'AND NUT WRENCH.

SPECIFICATION forming part of Letters Patent No. 238,041, dated February22, 1881,

Application filed January 5, 1881. (No model.)

To all whom it may concern:

Be it known that I, LAWRENCE GLYNN, a citizen of the United States,residing at Garnbridgeport, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements in Pipeand Nut Wrenches; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersor figures of reference marked thereon, which form a part of thisspecification.

This invention relates to improvements in pipe and nut wrenches, and itis carried out as follows, reference being had to the accompanyingdrawings, in which Figure 1 represents a side elevation. Fig. 2represents a longitudinal section; and Fig. 3 represents across-section, as seen from below the line A B, shown in Figs. 1 and 2.

Similar letters refer to similar parts wherever they occur on thedifferent parts of the drawingsl I a is the stationary jaw with itsdownwardprojecting shank or handle a, as shown. To the shank a, justbelow the jaw a, is secured the clamp b by means of rivets b b,- or itmay be forged or made in one piece with the shank a, if so desired.Through the rear projecting ends of the clamp bis inserted the rivet orfulcrum-pin 0 that passes through the slotted opening d in the shank dof the movable jaw d, as shown. The lower end of the shank d isscrew-threaded, as shown, for the reception of 't-heregulating-screw e,by means of which the movable jaw (Z is adjusted to and from thestationary jaw a, for which purpose the upper end of said screw 6 isbrought to bear against the under side of the stationary rivet orfulcrum-pin c, and the said screw 6 is manipu lated by turning theserrated thumb-piece c in its lower end, as shown. The under side of thethumb-piece e is made to reston a small 5 bracket or projectiomf, whichis secured to or made in one piece with the stationary shank a. Thebracket f is preferably provided in its outer end with a slottedperforation, f, (shown in Fig. 3,) that serves as a guide for thecenter-pin e on the thumb-piece e, as shown,when the movablejaw is swungon the fulcrum-pin c to grasp the pipe or nut between the jaws or torelease it, as the case may be.

It is not absolutely necessary to have a slotted perforation,f, in thebracketf, nor a pin, 6, in the serrated thumb-piece e, assaid slot andpin may be dispensed with without detracting from the practical workingof my improved wren ch.

g is a spring, interposed between the stationary shank a and movableshank d in the usual manner.

This improved wrench is particularly constructed with a view of makingit wholly of forged metals, although it may be made of malleable or castmetal, if so desired, without departing from the spirit of my invention.

Having thus fully described the nature, construction, and operation ofmy invention, I wish to secure by Letters Patent, and claim- Theherein-described pipe and nut wrench,

consisting of stationaryjaw a, its shank a,

and clamp 12, with fulcrum-pin c, of the movable jaw d, having elongatedslotted opening (1 through its shank d, and provided with a screw-threadin its lower end for the reception of the adjusting-screw c, and of theadjustable screw 6, combined with the bracket or projectionfon the shanka, and the spring g, as and for the purpose set forth.

In testimony whereof I have afiixed my signature in presence of twowitnesses.

LAWRENCE GLYNN.

Witnesses ALBAN ANDREN, HENRY UHADBOURN.

